Ultrasound-Guided Radiofrequency Ablation for Liver Tumors

The blood routine, coagulation function, and liver and kidney function were checked preoperatively, and enhanced CT or MRI examination was well-established. The puncture path was determined based on the specific location and size of the tumor under ultrasound. Ultrasound-guided live speaking ablation electrodes are needled into the tumor, and RFA begins after reaching the location. The specific ablation power and time were determined by the lesion size. Ultrasound during ablation was monitored in real-time to avoid damage to the intrahepatic ducts. Ablation margins for all tumors, except subcapsular, were planned to be at least 0.5 cm from the tumor border. The ablation process ends when the echogenic area created by RFA is large enough to cover the entire tumor and surrounding normal liver to achieve an adequate ablation margin on ultrasound.
The PLR is calculated as the platelet count divided by the lymphocyte count, and NLR is calculated as the neutrophils count divided by the lymphocyte count.